Gas-engine lock and key.



A. A. ARMSTRONG.

GAS ENGINE LOCK AND KEY. APPLICATION FILED Nov. 21. tan.

1 ,292,673. Patented Jan. 28, 1919.

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A. A. ARMSTRONG. (;As ENGINE LOCK AND KEY.

I I APPLICATION FILED NOV. 21, 1917' a 1,292,673. Patented Jan. 28,1919.

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AMASA A. ARMSTRONG, 0F EDMORE, MICHIGAN.

GAS-ENGINE LOGK AND KEY.

Specification of Letters Patent.

Patented Jan. 28, 1919.

Applicatiomfiled,Novcmber 21, 1917. Serial No. 203,210.

To all wimmz't may concern:

Be it knownthat LAMASA A. ARMs'rRoNe, a citizen of the Unitedv States,residing at Edmore, in the county of Montcalm and State of Michigan,have invented certain new and useful Improvements in Gas-Engine. Locksand Keys; and I do hereby declare the following to be a full, clear, and

- exact description of the invention, such as will enable others skilledin the art to which it appentains to make and use the'same.

This invention relates to improvements in engine locks and has for oneof its objects the provision of a device of this character whereby theexhaust and intake valves of the engine may beheld and locked in anunseat ed position, preventing compression in the cylinders therebypreventing starting of the engine.

Another object of this invention is the provision of means adapted to bemoved into the path of the valves for preventing them from returning toa, seated position after moving to an unseated position, thus obviatingcompression, in the cylinders and preventing runnmg of the engine.

A further object of this invention is the provision of combination meansfor locking and unlocking the means into and out of the paths of thevalves.

A still further object of this invention is theprovision of anengine-lock of the above stated character, which shall be simple,durable and eflicient, andwhiehmay be manufactured and sold at acomparatively low cost.

With these and other objects in view as will become more apparent asthedescription proceeds, the invention consists in certain novelfeaturesof construction, combination and arrangement of parts as will behereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be-hadtothe following. description and accompany ng drawings, n which Figure 1is a fragmentary vertical sectional view. of an eng ne illustrating theintake and exhaust valves having my invention associated therewith,

,. Fig. 2 is a fragmentary sectional view illustrating the means ofholding the valves in an unseated position,

Fig. 3 is a similar view illustrating the means of securing the dogs toa shaft,

Fig. 4 is a sectional view taken on the line 4-4 of Fig. 2,

Fig. 5 is a detail view partly in section of a tension means forengagement with the shaft,

Fig. 6 is a vertical view partly in section illustrating means ofsecuring the combination lock to the engine,

Fig. 7 is a similar view illustrating the specific construction of thelock,

Fig. 8 is a similar view taken atright angles to Fig. 7,

Fig. 9 is a transverse sectional view of the lock on line 99 of Fig. 6,

Fig. 10 is a perspective view of the lockin sleeve,

ig. 11 is a plan view and Fig. 12 is a perspective view of the body ofthe lock.

Referring in detail to the drawings, the numeral 1 indicates as anentirety an internal combustion engine having the usual sliding orpuppet valves 2 for controlling the exhaust and intake ports of theengine. These valves 2 are urged into a seated po sition by means ofsprings 3 that are interposed between the wall or flange of the engineand collars 4 secured on the lower ends of the valve stems. The collars4 and springs of the locking bolt,

3 are located in what is known as a valve' chamber 5 of the engine andwhich is usually closed by a removable plate. The foregoing descriptionrelates to a well known construction of engine and to which my inventionis applied.

The downwardly depending hangers Gare secured to the engine 1 within thevalve chamber 5 and have journaled therein a horizontally disposed shaft7. The shaft 7 has journaled thereon dogs 8 which are spring actuated bysprings 9 that normally urge the dogs into an engagement with thecollars 4 upon the valve stems of'the valves 2 as illustrated in Figs. 2and 3. Members 10 are secured to the shaft 7 and overlie the dogs 8 andhave secured thereto the ends of the springs 9. The members 10 areseowed to the shaft 7 by means of fastening elements 11 and are adaptedto engage notches 12 formed upon the dogs 8 for disengaging the dogsfrom the collars 4 upon the valve stems of the valves 2 when the shaft7is rotated in the hangers 6. Ahanger 13 is secured to the engine 1within the valve housing 5 and has secured to its lowermost end a leafspring 14 which rides upon squared faces 15 formed upon the shaft 7. Thespring 14 is adapted to hold the shaft against accidental rotationwithin the hangers 6. The shaft 7 is rotated or actuated by acombination lock 16, which will be hereinafter more fully described.When it is desired to lock the valves 2 in an unseated position, thecombination lock 16 is actuated to rotate the shaft 7 and by rotatingthe shaft 7, the dogs 8 are so positioned that the springs 9 will forcethem into the paths of the valves 2 and as the valves are unseated inthe ordinary manner, the dogs 8 engage under the collars 4 and preventsaid valves from seating, thus preventing compression within thecylinders of the en gine. When the compression within the cylinders ofthe engine is reduced or obviated, it is impossible to start or make theengine run, whereby means is provided for locking the engine againstthefts.

The combination lock 16 consists of a cylindrical body 17 which isexternally threaded as illustrated at 18 and disposed through an openingin the front wall of the engine 1 and in alinement with the forward endof the shaft 7. A collar 19 is threaded on the body 17 prior toinserting the same through the opening in the front wall of the engineand a lock nut 20 is threaded on the body after the body has beeninserted through the opening in the front wall of the engine so as tocooperate with the collar 19 and securely holding the body within theopening of the front wall. The collar 19 has formed thereon a flange 21which projects over the body 17 in spaced relation thereto as clearlyillustrated in Fig. 8.

A key or operating member 22 is slidably mounted within the body 17 andconsists of an inner section 23 and an outer section 24. The inner endof the inner section 23 is provided with a rectangular bore 25 toreceive the rectangular end 26 ,of the shaft 7 and is normally inengagement therewith. The outer end of the inner section 23 isbifurcated to form a pair of relatively spaced arms 27 which slidablyreceive a pair of relatively spaced arms 28 formed upon the inner end ofthe outer section 24. The outer end of the outer section 24 has formedthereon a head ,or finger grip 29 for sliding and turning the key oractuating member 22 in the body 17. The arms 27 are connected by a wall30 and a bolt 31 which is engaged by a .lock bolt 32 carried by the arms28 of the outer section 24 for limiting the sliding movement of thesections 23 and 24 in relation to each other. A coil spring 33 ispositioned within the outer section 24 and bears against the wall 30 forthe purpose of moving the section 23 into engagement with the shaft 7and moving the section 24 outwardly of the body 17 and which movement islimited by the lock bolt 32 engaging the pin 31. p

The body 17 is provided with a transverse slot 34 which receives one endof the lock bolt 32. The slot 34 is provided with longitudinallyextending branches 35 at each end thereof and an intermediate branch 36.A sleeve 37 is journaled upon the body 17 and which body is providedwith a collar 38 upon its outer end that rotatably receives the sleeveand prevents the sleeve from moving ofi the body in the direction of thehead or hand grip 29 upon the key 32. The inner end of the sleeve 37 isprovided with a pair of oppositely disposed extensions 38 between whichis formed a space 39 to receive a stop 40 formed upon the inner end ofthe body 17 for limiting the rotation ,of the sleeve upon said body. Theinner end of the sleeve 37 is provided with oppositely disposed bayonetslots 41 which are formed partially by the extensions 38 and are adaptedto cooperate with the branches 35 formed on the slot 34 in the body 17and locking the key 22 against sliding movement in the body byreceivino' andholdino' the upper end of the lock bolt 32. Anintermediate slot 42 is formed in the inner end of the sleeve 37 betweenthe bayonet slots 41 and is adapted to receive the upper end of the lockbolt 32.

Under normal conditions, the lock bolt 32 is normally disposed withinthe bayonet slots 41 and designated by the character A in Fig. 10, thesleeve 37 is turned to the right causing the said bayonet slot to freethe locking pin 32. The key 22 is then pushed inwardly causing thelocking pin 32 to disengage from one of the notches 35 into thetransverse slot 34. The key is then turned to the left causing the pinto move over and aline with the other branch or notch 35 and byreleasing the key, the spring 33 forces the same outwardly causing thelocking be 32 to pass into the said branch 35. l/Vhen the key 22 ismoved to the left in the manner heretofore described, the shaft 7 ismoved in a corresponding direction causing the dogs 8 to be moved out ofthe paths of the valves 2 permitting said valves to work freely toperform their function. When it is desired to lock the engine, thesleeve 37 is-turned to the left causing the bayonet slots to free thelocking pin and the key is pushed inwardly and turned t0.the right intothe other branch 35 and the sleeve is then turned to the right causingthe bayonet slot A to lock said pin Within said branch 35. As the keyturns to the right, the dogs 8 are moved in the path of valves 2, and asthe valves more upwardly or into an unseated position and the springs 9force the dogs under the collars and hold said valves in an unseatedposition.

WVhile I have shown and described the preferred embodiment of myinvention, it will be understood that minor changes in construction,combination and arrangement of parts may be made Without departing fromthe spirit and scope of the invention as claimed.

Having thus described my invention, what I claim is.

1. The combination with an engine including valves of a shaft journaledto the engine, means carried by the shaft and adapted to be moved intoengagement with the valves, and means for rotating and locking the shaftagainst movement.

2. The combination with an engine including reciprocating valves, ashaft journaled to the engine, spring actuated dogs carried by saidshaft, means for rotating the shaft to cause the dogs to engage thevalves and hold them in an unseated position, and means locking theshaft against rotation.

3. The combination with an engine having valves, a shaft journaled tothe engine, dogs journaled on said shaft, members secured to the shaftand overlying the dogs, springs engaging the dogs and wound about theshaft and secured to said members, and means for rotating the shaft ineither direction to engage and disengage the dogs from the valves.

4. The combination with an engine having valves, a shaft journaled inthe engine, members carried by said shaft, rectangular faces formed onsaid shaft, a member secured to the engine, a leaf spring secured tosaid member and adapted to engage the squared faces of the shaft andmeans for turning the shaft to move the members into and out ofengagement with the valves.

5. The combination with an engine having valves, a shaft journaled inthe engine, means carried by the shaft for engagement with the valves,and a combination lock secured to the engine and connected with theshaft for locking and for unlocking the shaft against rotation.

6. The combination with an engine hav- Oopiee of this patent may beobtained for a shaft journaled in the engine, means carried by the shaftfor engagement with the valves, a body secured to the engine and a keylidable in said body and connected to the shaft for operating saidshaft.

7 The combination with an engine including valves, of a shaft journaledto the engine, means carried by the shaft for engagement with thevalves, a body secured to the engine, a spring actuated pin slidable insaid body and connected with the shaft for rotating the same, and meanslocking said pin against movement.

8. The combination with an engine including valves, a shaft journaled tothe engine, means carried by the shaft for engagement with the valves, abody secured to the engine, a key slidable in said body and connected tothe shaft and consisting of inner an outer sections, means slidablyconnecting the sections, a spring interposed within the outer sectionand bearing against the inner section, and means locking the key againstmovement within the body.

9. The combination with an engine including valves, a shaft journaled tothe engine, means carried by the shaft and adapted to engage the valves,a body secured to the engine, a key slidably mounted in the body andconnected to said shaft, said body having a transverse slot andcommunicating branches, a lock bolt carried 'by the key and extendingthrough the slot, and a sleeve journaled on the body for engaging thelock bolt to hold the key against sliding and rotating movement.

10. The combination with an engine having valves, of a shaft journaledto the engine, means carried by the shaft for engagement With thevalves, a body secured to the engine, a key slidably and rotatablymounted in said body and connected to the shaft, said body having atransverse notch and communicating branches, a lock bolt carried by thekey and extending through the slot, and a sleeve journaled on the bodyand having bayonet slots to receive the lock bolt to hold the keyagainst sliding and rotating movement.

In testimony whereof I affix my signature in presence of two witnesses.

AMASA A. ARMSTRONG.

Witnesses:

V. C. Conn,

JOSEPH SNELL.

ing valves,

five cents each, by addressing the "Commissioner of Patentl,

Washington, D. 0."

